Crystal Reports Enterprise 8.5 not parsing CSP pages

It was working like a charm, but I broke it by reinstalling the software. It doesn't serve CSP pages anymore, it just shows the code without parsing it. Are there any steps that you need to take in IIS? Perhaps adding an ISAPI filter?

Also, it used to offer some reports in the browser, now it just offers them for download, which appears to not work either.

CWS is running, but iis doesn't seem to be routing requests for .csp/.rpt pages to it.